Dust dedusting and humidifying system
The dust removal and humidification system, which combines a humidification chamber with an atomizer, solves the problems of flammability and explosiveness of silicon dust, filter bag clogging, and difficulty in settling, thus achieving safe and efficient dust treatment.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- 内蒙古鑫元硅材料科技有限公司
- Filing Date
- 2025-08-26
- Publication Date
- 2026-08-04
AI Technical Summary
In the industrial production of granular and nano-silicon, silicon dust is flammable and explosive, charged dust can clog filter bags, nanoparticles are difficult to settle, and direct spraying for humidification can easily cause agglomeration, affecting equipment safety and operation.
The dust removal and humidification system adopts a combination of humidification chamber and atomizer. By controlling the mixing of water mist and dust-laden gas, a thin water film is formed to reduce resistivity. Combined with detection instruments, the amount and pressure of water mist are adjusted to avoid explosion and agglomeration.
It effectively reduces the risk of dust explosion, prevents filter bag clogging, improves settling efficiency, avoids equipment wear and agglomeration, and optimizes the dust treatment process.
Smart Images
Figure CN224585593U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of dust removal, specifically to a dust removal and humidification system. Background Technology
[0002] In the industrial production of granular and nano-silicon, crushing, grinding, separation, and classification processes all generate large amounts of silicon dust. Existing processes use dust collection systems to capture dust-laden airflow, which is then conveyed through pipelines to settling chambers, bag filters, and other equipment to achieve silicon dust separation and recovery. However, the following key issues in this dust collection process urgently need to be addressed: 1. Silica dust (especially fine powder with a particle size <75μm) is flammable. When it reaches the lower explosive limit concentration in the air (typically 60-500g / m3), it can cause an explosion when exposed to sparks, high temperatures or electrostatic discharge.
[0003] 2. Charged dust will strongly adhere to the filter bags and pipe walls of the dust collector, causing filter bag blockage, reduced ventilation efficiency, and increased cleaning difficulty; in severe cases, the static charge accumulated by friction can trigger an electric spark that ignites the dust cloud.
[0004] 3. Dry dust particles are at the nanoscale and have low density, making effective separation difficult in a gravity settling chamber. Most particles escape with the airflow, exacerbating wear on conveyor pipes, fan impellers, and other equipment, significantly increasing equipment maintenance costs.
[0005] 4. If the spray humidification process is used directly, the humidity is likely to be too high. After the silicon dust absorbs moisture, its stickiness increases sharply and it will clump together, which will cause operational obstacles to the subsequent dust collection, transportation, storage and treatment. Utility Model Content
[0006] The purpose of this invention is to provide a dust removal and humidification system.
[0007] This utility model is implemented by the following technical solution: A dust removal and humidification system includes a humidification chamber, an air inlet connected to an air inlet pipe, and an exhaust port connected to an exhaust pipe. Several mist exhaust nozzles are fixed to the top of the humidification chamber, with their outlets located inside the chamber. The inlets of the mist exhaust nozzles are connected to the outlet of an atomizer and the outlet of a pressurized air pipe. A pressure regulating valve is installed on the pressurized air pipe, a dust concentration detector and a pressure gauge are installed on the air inlet pipe, and a humidity detector is installed on the exhaust pipe. The signal output terminals of the dust concentration detector, humidity detector, and pressure gauge are all electrically connected to the signal input terminal of the controller, and the signal output terminal of the controller is electrically connected to the signal input terminals of the atomizer and the pressure regulating valve, respectively.
[0008] Preferably, the outlet of the mist exhaust nozzle is offset by 5-30° towards the direction of dust-laden gas flow within the humidification chamber.
[0009] Preferably, an intake valve and an exhaust valve are respectively installed on the intake pipe and the exhaust pipe, a bypass pipe is connected between the intake pipe and the exhaust pipe, and a bypass valve is installed on the bypass pipe.
[0010] Preferably, the bottom of the humidification chamber is inclined in the direction opposite to the flow direction of the dust-laden gas, and a drain pipe is connected to the lowest point of the humidification chamber.
[0011] Advantages of this utility model: 1. Dust-laden gas enters the humidification chamber through the inlet pipe. The water mist generated by the atomizer is sent into the humidification chamber through the exhaust nozzle. The water mist mixes with the dust-laden gas and is discharged from the exhaust pipe, causing a thin water film to be adsorbed on the surface of the dust, which significantly reduces the surface resistivity and avoids the risk of high voltage discharge due to accumulation. 2. A humidity detector is used to detect the humidity of the mixed gas. If the humidity detector detects that the humidity has reached the maximum value, the atomizer will be shut off to prevent the humidity from being too high. Attached Figure Description
[0012] Figure 1 This is a schematic diagram of the structure of this utility model; Figure 2 This is a control diagram of the present invention.
[0013] In the diagram: 1. Humidification chamber; 2. Inlet pipe; 3. Exhaust pipe; 4. Mist nozzle; 5. Atomizer; 6. Pressurized air pipe; 7. Pressure regulating valve; 8. Dust concentration detector; 9. Pressure gauge; 10. Humidity detector; 11. Controller; 12. Inlet valve; 13. Exhaust valve; 14. Bypass pipe; 15. Bypass valve; 16. Drain pipe; 17. Static mixer. Detailed Implementation
[0014] like Figure 1 and Figure 2 As shown, a dust removal and humidification system includes a humidification chamber 1, an air inlet of the humidification chamber 1 connected to an air inlet pipe 2, and an exhaust port of the humidification chamber 1 connected to an exhaust pipe 3; a plurality of mist exhaust nozzles 4 are fixed on the top of the humidification chamber 1, the outlets of the mist exhaust nozzles 4 are located inside the humidification chamber 1, and the inlets of the mist exhaust nozzles 4 are connected to the outlet of an atomizer 5 and the outlet of a pressurized air pipe 6; a pressure regulating valve 7 is installed on the pressurized air pipe 6, a dust concentration detector 8 and a pressure gauge 9 are installed on the air inlet pipe 2, and a humidity detector 10 is installed on the exhaust pipe 3; The signal output terminals of the dust concentration detector 8, humidity detector 10, and pressure gauge 9 are all electrically connected to the signal input terminal of the controller 11. The signal output terminal of the controller 11 is electrically connected to the signal input terminals of the atomizer 5 and the pressure regulating valve 7, respectively.
[0015] During production, dust-laden gas enters the humidification chamber 1 through the inlet pipe 2. The water mist generated by the atomizer 5 is sent into the humidification chamber 1 through the exhaust nozzle 4. The water mist mixes with the dust-laden gas and is discharged from the exhaust pipe 3. After being fully mixed by the static mixer 17, a thin water film is adsorbed on the surface of the dust, which significantly reduces the surface resistivity and avoids the risk of high voltage discharge caused by accumulation. Then it is sent to the settling chamber for dust removal. The dust concentration detector 8 is used to detect the dust concentration and send the detection signal to the controller 11. The controller 11 controls the atomizer 5 to adjust the water mist generation. The higher the dust concentration, the higher the water mist generation. Taking actual production as an example, when the dust concentration is 1000 NTU, the water mist generation corresponds to 30000-40000 PPMV. The humidity is detected by a humidity detector 10. If the humidity detector 10 detects a humidity greater than 40,000 PPMV, it sends the detection signal to the controller 11. The controller 11 controls the atomizer 5 to shut down until the humidity detector 10 detects a humidity of 30,000-40,000 PPMV. Then the atomizer can operate normally to avoid excessive humidity.
[0016] Pressure gauge 9 is used to detect the pressure of dust-laden gas and send the detection signal to controller 11. Controller 11 controls the opening of pressure regulating valve 7 so that the pressure of the mixture of compressed air and water mist is slightly higher than that of the dust-laden gas, so that the compressed air in the booster air pipe 6 can carry the water mist into the humidification chamber 1 and prevent the dust-laden gas from backflowing.
[0017] The outlet of the mist nozzle 4 is offset by 5-30° towards the direction of the dust-laden gas flow inside the humidification chamber 1, so that the discharged water mist is close to the direction of the dust-laden gas flow and can flow in the direction of the dust-laden gas flow, avoiding the dust-laden gas being disturbed by the water mist, which would cause a large amount of silicon powder to fall to the bottom of the humidification chamber 1.
[0018] An intake valve 12 and an exhaust valve 13 are installed on the intake pipe 2 and the exhaust pipe 3, respectively. A bypass pipe 14 is connected between the intake pipe 2 and the exhaust pipe 3. A bypass valve 15 is installed on the bypass pipe 14. When the humidification chamber 1, the atomizer 5 and the pipeline need to be repaired, the intake valve 12 and the exhaust valve 13 are closed and the bypass valve 15 is opened, so that the dust-laden gas is sent to the settling chamber through the bypass pipe 14.
[0019] The bottom of the humidification chamber 1 is inclined in the opposite direction to the flow direction of the dust-laden gas. A drain pipe 16 is connected to the lowest point of the humidification chamber 1 to facilitate the collection of the mixture of silica powder and water that settles at the bottom. At the same time, the inclination in the opposite direction to the flow direction of the dust-laden gas can prevent the mixture of silica powder and water from scouring the drain pipe 16 and the valves installed.
[0020] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.
Claims
1. A dust dedusting and humidifying system, characterized in that, The device includes a humidification chamber, with its air inlet connected to an air inlet pipe and its exhaust outlet connected to an exhaust pipe. Several mist exhaust nozzles are fixed to the top of the humidification chamber, with their outlets located inside the chamber. The inlets of the mist exhaust nozzles are connected to the outlet of an atomizer and the outlet of a pressurized air pipe. A pressure regulating valve is installed on the pressurized air pipe, a dust concentration detector and a pressure gauge are installed on the air inlet pipe, and a humidity detector is installed on the exhaust pipe. The signal output terminals of the dust concentration detector, humidity detector, and pressure gauge are all electrically connected to the signal input terminal of the controller, and the signal output terminal of the controller is electrically connected to the signal input terminals of the atomizer and the pressure regulating valve, respectively.
2. The dust precipitating and humidifying system according to claim 1, characterized in that, The outlet of the mist exhaust nozzle is offset by 5-30° towards the direction of dust-laden gas flow inside the humidification chamber.
3. The dust dewatering and humidifying system according to claim 1 or 2, characterized in that, An intake valve and an exhaust valve are respectively installed on the intake pipe and the exhaust pipe. A bypass pipe is connected between the intake pipe and the exhaust pipe, and a bypass valve is installed on the bypass pipe.
4. The dust precipitating and humidifying system according to claim 2, wherein The bottom of the humidification chamber is inclined in the opposite direction to the flow direction of the dust-laden gas, and a drain pipe is connected to the lowest point of the humidification chamber.